Improvement in devices for cutting slats for window-shades



einen' nes- Letters Patent N0. 109,487, dated November 22, 1870.

IMPROVEMENT IN DEVICES FOR CUTTING SLATS FOR WINDOW-SHADES.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concern Ie it known that I, FnANeis A. BixLnn, of Nashville, in the county otl Davidson and State of Tennessee, have invented a new and improved Machine for Cutting \Vimlow-Shade Slats and I do hereby declare the following'to be a full, clear, and exact description ot.' the same, reference being had to the' accompanyingr drawing making apart of this specilication, in which- Figure lis a plan;

Figure 2, a side view; and

Figure 3 a longitudinal vertical section through line :v a: of Iig. 1.

rlhe object of thisinvention is to so improve machines 0i' this class that they will hold the stick more firmly inthe proper position during' their operation, while at the same time they will cut out the slat with the least possible expenditure of power.

lo this end the invention consists in thel construction and arrangement ofthe devices as'hereinafter set forth.

1n the drawing.-

A represents a supporting-plank or frame, which is cut wedge-shaped across the grain of the wood, to pre1 vent warping, and is reinforced by two lateral pieces, B I5', bolted together through the piece A, the upper edge of piece I3 coming above, and the upper edge ot' piece B' slightly below the upper edge of the piece A.

G is writting-blade, arranged obliquely across the upper side of piece A, as shown in lig. 1, and fastened by scre\\"bolts and nuts c e, to the parts B B', the bearings heilig so cut-out or constructed as to hold the cutting-edge of the blade a little higher than the rear edge, as seenin figs. 2 and 3.

The edge of lthe frame-piece A is out out or recessed under the cutting-blade, as represented at E.

In front of the blade a metallic plate, M, wider at one end than at the other, is set into the face of the part A, its upper surface slightly below the line of the enttingcdge (j.

I) is a' pivotedspring-arm arranged obliquely'on plate M, and bearing a guide-roller, d, 'at the end nearest to the cutter, its opposite end being provided with a clamping-screw, s, which extends down through a curved slot, r, in plate M, for the purpose of adjusting the distance between roller d and the side of piece B, according to the width f the slat to be cut out.

A curved flat spring, c, is fastened to the under sid'e of plate M at its' front edge, and extends down into recess E, and then up toward the blade C, in the manner clearly shown in iig. 3, its object being to hold the slat firmly up against the blade, so as to prevent cutting irregularly.

The bearings of the knife G are made inclined from front to rear, so that the thickness of the slat can be controlled by setting the blade forward or back, said bearings being covered with metallic plates o o, to prevent the knife from working loose.

The bolts I) b, whieheouiine the parts B B to the frame A, may bc made to operate in slots y y in the side pieces or center piece, so that, by means of them, the blade C can be adjusted higher or lower,l at pleasure. v

In practical operation the width of the bed or track in which the stick is to move back and forth is to be adjusted by means of screw s, according to the width of the Slat, the stick lying'between roller d and sidepiece I3, and being held lirmly against the latter by the spring.

The stick is then pushed forward against the knife, which cuts out the slat fromthe under side, theslat passing between spring e and the blade, and the stiel; passing'or-er the blade.

The diagonal position of the `latter enables it to.

cut into the wood more easily than if it was arranged squarely across the line of motion of the wood to be cut.

.Having t-hus described my invention,

What I claim as new, and desire to secure by Letters Patent, is-

1.v '.Ihe spring-guide I) and plate M, provided with 'the slot lr and clamping-screw s, constructed and ar ranged to operate as described.

2. I he frame-piece A., provided with 'slot r, the side pieces B B, the knife C, and the' set-'screw I), all constructed and arranged to operate as described.

FRANCIS A. BIXLER. Witnesses:

J. K. JENKINS, J.- W. Scorer. 

